Clamping bolt



F. A. LEIVHCH.

CLAMPI NG BOLT.

APPLICATION FILED 050.29, 1920.

1,414,089. Patented Apr. 25-;' 1922.

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To 'all whom-it may-concern:

Be it known that I, FREDERICK A. LE I H, a citiz en'of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful 3 Improvements in Clamping Bolts, of-which the following isv fl SPSCifiQdltion. f

I This invention vrelates to afthreadlessclamping bolt and is .diyision of ny co pending. application entitled,.fMethod. of-

drawing. up and clainpingr steel plates, etc,

andv apparatus thereforfl filed M r-.01 3, 1920,, 5 Serial No.362-,9,02. Y

h p yard nd in many a ie w s it happens that much of the material handle'd must be gtemporar'ilyclam ped,or bolted into position before the plates can bepermaiiently riveted, or otherwise secured place. This'is particularly tru'eof-ship or hull construction; The temporary work of placing and bolting the plates in position on the framework of a ship is known as bolting up. Ordinary bolts and nuts are employed: for

this purpose. They are inserted by one man and the nut is then applied and tightened up w by a second man positioned ontli'e opposite side of the plate. The plates when temporarily bolted up often remain so secured for days and weeks, and as the whole hull is exposed to wind and weather, itcan' readily be seen that theteinporary fastening means, to-wit, the bolts andnuts are very liable to set and rust. In fact it often happens that the nuts become 'so'permanently set that hammers and chisels have to be employed in removing the same, thus damaging the bolts and nuts to such an extent that re-use is often out of the question. Tons of bolts and nuts are destroyed annually in most ship yards and is the source of considerable waste and expense, both in regard to labor and material, that is considerable time is wasted both in applying and removing the temporary fastening means, and as the fastening means or. the bolts are to a certain extent destroyed, it should be obvious that unneccs sary waste of material takes place.

The object of the present invention is to. reduce the waste of bolts and nuts referred to by providing a special clamping bolt which can bequickly applied and removed, which is not affected by rust or Weather conditions, not subject to damage either during ppl ation e r m val, a wh h n irely eliminates the'use of threadsand' nuts.

mentof parts as hereinafter more fully dea scribed and claimed, having reference to the;

accompanying drawings, in wliiche Siamese f t reri aten ed Ainf- 2 1922- Original application file d Maich ii, i920, Seiia1No. 362,902. *ni aea aj h animation, fi e Decemmr'I 29,1920. Serial No; 433,349,. 1,

' Figil is a perspective VlfiW'O f the clamp-1 ins, e t. nd he ed conjunction therewith.

P e. employed i 5 Fig- 21% C e e ti n. of he Wedgeplatef ew ne' "in p sifion'en hebolt.;-

i a Sid elevatio f he ii dge Re tto the in ndica es ni rd ar y lt w ch-may e sq a r ro nd .in r s sec on her hown Fa m d on one endet he b tisa headniember 2, and formed on'the opposite i end of the bolt is a pair of opposed V-shaped notches 3 which form shoulders 4. Adapted to cooperate with the bolt'is awedge plate V;

generally indicated at B. .-This plate is sub- -stantially-rectangular-shaped and is pro-.

.videdwith an elongated slot 5, the lower end of which is enlarged as at 6 to permit the bolt to be passed therethrough. The f wedge plate-tapers "from end to end as shown. in s Fig. '1, being heaviest at the; upper endias' -E 3 tapers to lit the \l shaped notchesv formedin I indicated -at7. The slot formed at 5lalso the bolt, such taper being providedto permit aisnug fit and cooperation of the bolt "and wedge, andtomaterially increase the strength of both. v r

In actual operation when bolting up plates, for instance on board aship, it is first necessary to lift the plates in position,

then to draw the plates tightly together, and

finally to temporarily secure them 'when.

tightly drawn up by bolts of suitable construction; the usual practice being to; employ ordinary threaded boltsjand nuts. In

the present instance when the plates are drawn together and ready for bolting up, it

is only necessary to insert-thebolt shown j in F igs. l and 2, that is the'bolt is passed through the aligned rivet; holes formedin the plates. slipping itendwise over the pointed end of The'wedge is then applied by the bolt indicated at 8, and then dropping it down when the slot 5'registers with the shoulders The wedge is then driven tightly. into position by striking it on the upper heavy end 7 by means of a hammer or similar tool. As many bolts and wedging plates may be applied as is necessary and these are permitted to remain in position until actualriveting is commenced.

it is necessary that one man hold the head of the bolt with a wrench, while the other man is applying and tightening up the nut. Two men are necessarily required for this operation and the time employed is of course considerable when compared with the application of the clamping bolt shown in this instance; similarly, removal of ordinary bolts and nuts, particularly if they have become-more orless set or rusty, often requires the use of hammers, chisels, etc and ust as often results in damage to the bolts and .nuts of such a nature that re-use is impossible. This causes loss of time and material, and unnecessary expense in regard to labor. The present clamping bolts are not afiected by rust, etc., and the time required very small when-compared with the screw bolts just described. For instancewhen removing the clamping bolts employed in this instance,;it is accomplished by slightly tapping the wedge plate on the lower side, such tapping relieves the wedge plateand permits it to be freely and quickly removed.

Having-thus described my invention, what I claim and desire to secure by Letters Patent is- A clamping bolt comprising a bolt having a head member formed on one end, a pair of opposed V-shaped notches formed on the opposite end of the bolt and presenting shoulder members, a wedge plate cooperating with the bolt, said plate being substantially rectangular in shape and tapering from end to end, an enlarged opening formed in one end of the plate, through which the.

bolt may be inserted, and an elongated slot formed in the wedge plate and communicating with the enlarged opening, the walls of said slot tapering to lit the V-shaped notches formed inthe bolt. 1

= FREDERICK A. LEMIGH.

-Wit11ess:' 1 i E. D. CAVENDER. 

